function formfocus(namafield,nilaifield) {
	switch (namafield) {
		case 'txtNama':
			if (nilaifield == 'Ketik nama (wajib)') document.getElementById('txtNama').value='';
			break;
		case 'txtPerusahaan':
			if (nilaifield == 'Ketik nama perusahaan') document.getElementById('txtPerusahaan').value='';
			break;
		case 'txtTel':
			if (nilaifield == 'Ketik nomor telepon anda (wajib)') document.getElementById('txtTel').value='';
			break;
		case 'txtEmail':
			if (nilaifield == 'Ketik email (wajib)') document.getElementById('txtEmail').value='';
			break;
		case 'txaComment':
			if (nilaifield == 'Ketik komentar di sini (wajib)') document.getElementById('txaComment').innerHTML='';
			break;
	}
 }
 
 function formblur(namafield,nilaifield) {
	switch (namafield) {
		case 'txtNama':
			if (nilaifield == '') document.getElementById('txtNama').value='Ketik nama (wajib)';
			break;
		case 'txtPerusahaan':
			if (nilaifield == '') document.getElementById('txtPerusahaan').value='Ketik nama perusahaan';
			break;
		case 'txtTel':
			if (nilaifield == '') document.getElementById('txtTel').value='Ketik nomor telepon anda (wajib)';
			break;
		case 'txtEmail':
			if (nilaifield == '') document.getElementById('txtEmail').value='Ketik email (wajib)';
			break;
		case 'txaComment':
			if (nilaifield == '') document.getElementById('txaComment').innerHTML='Ketik komentar di sini (wajib)';
			break;
	}
 }
 
function tanggalsurat() {
	var currentTime = new Date()
	var month = currentTime.getMonth() + 1
	var day = currentTime.getDate()
	var year = currentTime.getFullYear()
	document.getElementById('tanggalsurat').innerHTML = day + "/" + month + "/" + year;
}

function trim(teks) {
	teks=teks.replace(/^(\s)+/,'');
	teks=teks.replace(/(\s)+$/,'');
	return teks;
}

function valUmbal() {
	if (trim(document.getElementById('txtNama').value) == '' || document.getElementById('txtNama').value=='Ketik nama (wajib)') {
		window.alert("Mohon isikan nama anda. Terima kasih.");
		document.getElementById('txtNama').focus();
		return false;
	}
	if (trim(document.getElementById('txtTel').value) == '' || document.getElementById('txtTel').value=='Ketik nomor telepon anda (wajib)') {
		window.alert("Mohon isikan nomor telepon anda. Terima kasih.");
		document.getElementById('txtTel').focus();
		return false;
	}
	if (trim(document.getElementById('txtEmail').value) == '' || document.getElementById('txtEmail').value=='Ketik email (wajib)') {
		window.alert("Mohon isikan e-mail anda. Terima kasih.");
		document.getElementById('txtEmail').focus();
		return false;
	}
	if (document.getElementById('txtEmail').value.match((/(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/)) || !(document.getElementById('txtEmail').value.match(/^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,4})(\]?)$/))) {
		window.alert("E-mail tidak valid. Mohon diperbaiki.");
		document.getElementById('txtEmail').focus();
		return false;
	}
	if (trim(document.getElementById('txaComment').value) == '' || document.getElementById('txaComment').innerHTML=='Ketik komentar di sini (wajib)') {
		window.alert("Mohon isikan komentar anda. Terima kasih.");
		document.getElementById('txaComment').focus();
		return false;
	}
}